Self-oiling swing hook



y I F. McLAlN 2,201,046

SELF-OILING SWING HOOK Filed April 22, 1938 2 Sheets-Sheet 1 May 14,1940. F. H. McLAIN 2,201,046

' SELF-OILING SWING HOO/K Filed April 22, 1938 2 Sheets-Sheet 2 I I I II I I .9 I I I I l I I I I l I I I t Patented May 14, 1940 UNITED STATESPATENT OFFICE 1 Claim.

My invention relates to an improvement in self-oiling swing hooks.

The object is to provide a very simple construction for supporting porchor playground swings,

which is self-lubricating and easily accessible for replenishment of thelubricant at any time.

A further object is to provide a fixture, all parts of which may beeasily and inexpensively constructed and assembled and any worn. partrenewed without difiiculty.

A further object is to provide a construction of few, simple, durableand easily assembled elements.

In the accompanying drawings:

Fig. 1 is a view of the hook in side elevation with the supportingbracket shown in section;

Fig. 2 is a transverse section taken at rightangles to Fig. 1;

Fig. 3 is a top plan view of the bracket and hook in place therein;

Fig. 4 is a view in perspective of the hook;

Fig 5 is a view in elevation, partly in section, of a playground swinghook;

Fig. 6 is a vertical section on the line 6-43 of Fig. 5 looking to theleft in the direction of the arrows; and

Fig. 7 is a horizontal section on line 'l--'l of Fig. 5.

A, represents the hook, preferably oval in shape,

with a rounde cam. l depending from the upper center and in the generalplane of the rest on the hook. The numeral 2 is a hanger. This has arecess 3 at the bottom curved to fit, approximately, the lower edge ofthe cam, and sufiiciently deep to form an ample receptacle for oil orother lubricant, the idea being that this lubricant receptacle 3 is ofsufiicient size and capacity to hold enough lubricant so that the lowerend of the cam is always submerged therein, and will continue to remainwell oiled, no matter how far the hook swings, or practically how long.

The lower end of the hook A is provided with an indirect opening 4adapted to receive the link 5 of the swing chain and preclude any dangerof the chain ever being jerked out of the hook.

The two members of which the fixture is composed, namely the hook A andthe hanger 2, are first assembled, and then the hanger is fastened tothe ceiling by screws, bolts or other devices 6, and the loop 5 of theswing chain is dropped into the open lower end of the hook, as shown inFigs. 1 and 2.

In Figs. 5, 6 and '7, an adaptation is illustrated for the use of theswing in playgrounds or else- 5 where out, in the open. Thisconstruction is only slightly different from that illustrated in Figs.1,

2, 3 and 4, but as playground equipment is frequently subjected to moreconstant use, heavier weights, and more severe punishment, provision 10is made for this by making the cam 'l of a more or less bulbous shape asshown in Fig. 6. While this may not be necessary, this is aprecautionary measure merely.

This construction is provided with a clamp 8 15 to fasten. over a pipeor other support 9. This clamp may be of any approved form, in a singlering for instance as illustrated, or it might be made in clampingsections, a perfectly obvious alternative, with the ends bolted orotherwise se- 20 cured together.

In this form also a cover or hood I0 is provided as a protection for themoving parts below. This may be a separate element, or formed integralwith the clamp B, as shown. in the draw- 25 ings.

Fastening devices ll of any approved form, such for instance as bolts asthe drawings show, secure the hanger l2 within the cover and to the topthereof. 39

The hook and hanger, especially in the form shown in Figs. 1 to 4, maybe die-stamped and hence manufactured very cheaply. The playgrounddesign, probably, will be cast of malleable iron. The larger size cam lof this type of swing 35 hook may be cast without any additionalmanufacturing cost, but it is very desirable that this cam be large onits lower surface to carry the load and withstand the strain and hardusage they are likely to get in playground equipment. 40

I claim:

A hook having an eye with an internal substantially disk-like camconnected to the rim. of the eye by a narrow neck, and a hanger providedwith a lubricant receptacle to receive the cam and lubricant, whereby toform a self-lubricating bearing in which the hook is adapted to swing.

FREMONT H. MCLAIN.

